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annotate build.sh @ 1181:0cc86c6680ac

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List more environment variables sanitizing shouldn't drop.
author Rob Landley <rob@landley.net>
date Tue, 27 Jul 2010 01:40:50 -0500
parents 3c8d91339f2a
children 19f3be2b4d04
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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137ba51ee993 Delete output directories on re-run, teach build to log and build multiple
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1 #!/bin/bash
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2
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3 # Run all the steps needed to build a system image from scratch.
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5 # The default set of stages run by this script is:
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6 # download, host-tools, simple-cross-compiler, simple-root-filesystem,
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7 # native-compiler, root-filesystem, system-image.
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8
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9 # That sanitizes the host build environment and builds a cross compiler,
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10 # cross compiles a root filesystem and a native toolchain for the target,
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11 # and finally packages the root filesystem up into a system image bootable
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12 # by qemu.
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14 # The simplest set of stages is:
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15 # download, simple-cross-compiler, simple-root-filesystem, system-image.
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16 #
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17 # That skips sanitizing the host environment, and skips building the native
e5f9681a8b3c Lots of comment updates. Add a NO_HOST_TOOLS=1 config option, and a few "time" calls to stages that didn't have them. Put native-compiler.sh after root-filesystem.sh in build so it's slightly easier to document.
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18 # compiler. It builds a system image containing just enough code to boot to
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19 # a command prompt. To invoke that, do:
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20 #
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21 # NO_HOST_TOOLS=1 NO_NATIVE_COMPILER=1 ./build.sh $TARGET
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23 # The optional cross-compiler stage (after simple-cross-compiler but before
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24 # simple-root-filesystem) creates a more powerful and portable cross compiler
e5f9681a8b3c Lots of comment updates. Add a NO_HOST_TOOLS=1 config option, and a few "time" calls to stages that didn't have them. Put native-compiler.sh after root-filesystem.sh in build so it's slightly easier to document.
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25 # that can be used to cross compile more stuff (if you're into that sort of
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26 # thing). To enable it, "export CROSS_HOST_ARCH=i686" (or whichever target
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27 # you want the new cross compiler to run on).
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28
e5f9681a8b3c Lots of comment updates. Add a NO_HOST_TOOLS=1 config option, and a few "time" calls to stages that didn't have them. Put native-compiler.sh after root-filesystem.sh in build so it's slightly easier to document.
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29 # Start with some housekeeping stuff. If this script was run with no
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30 # arguments, list available architectures out of sources/targets.
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31
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32 if [ $# -ne 1 ]
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33 then
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34 echo "Usage: $0 TARGET"
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35
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36 echo "Supported architectures:"
e5f9681a8b3c Lots of comment updates. Add a NO_HOST_TOOLS=1 config option, and a few "time" calls to stages that didn't have them. Put native-compiler.sh after root-filesystem.sh in build so it's slightly easier to document.
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37 cd sources/targets
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38 ls
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39
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40 exit 1
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41 fi
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42 ARCH="$1"
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44 # Use environment variables persistently set in the config file.
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45
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46 [ -e config ] && source config
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48 # Allow the output directory to be overridden. This hasn't been tested in
e5f9681a8b3c Lots of comment updates. Add a NO_HOST_TOOLS=1 config option, and a few "time" calls to stages that didn't have them. Put native-compiler.sh after root-filesystem.sh in build so it's slightly easier to document.
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49 # forever and probably doesn't work.
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50
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51 [ -z "$BUILD" ] && BUILD="build"
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52
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53 # Very simple dependency tracking: skip stages that have already been done
e5f9681a8b3c Lots of comment updates. Add a NO_HOST_TOOLS=1 config option, and a few "time" calls to stages that didn't have them. Put native-compiler.sh after root-filesystem.sh in build so it's slightly easier to document.
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54 # (because the tarball they create is already there).
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56 # If you need to rebuild a stage (and everything after it), delete its
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57 # tarball out of "build" and re-run build.sh.
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58
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59 not_already()
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60 {
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61 if [ -f "$BUILD/$1-$ARCH.tar.bz2" ]
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62 then
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63 echo "=== Skipping $1-$ARCH (already there)"
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64 return 1
8b5ea56e7507 Teach build.sh not to rebuild static compilers if they're already there.
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65 fi
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66
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67 return 0
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68 }
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69
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70 # The first two stages (download.sh and host-tools.sh) are architecture
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71 # independent. In order to allow multiple builds in parallel, re-running
2b68517f5b62 Break out simple-root-filesystem.sh and root-filesystem.sh (adding native-compiler.sh output), and use NO_NATIVE_COMPILER to determine which to use. Rename STATIC_CC_HOST to CROSS_HOST_ARCH.
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72 # them after they've already completed must be a safe NOP.
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73
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74 # Download source code.
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75
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76 time ./download.sh || exit 1
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77
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78 # Build host tools. This populates a single directory with every command the
2b68517f5b62 Break out simple-root-filesystem.sh and root-filesystem.sh (adding native-compiler.sh output), and use NO_NATIVE_COMPILER to determine which to use. Rename STATIC_CC_HOST to CROSS_HOST_ARCH.
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79 # build needs, so we can ditch the host's $PATH afterwards.
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81 if [ -z "$NO_HOST_TOOLS" ]
e5f9681a8b3c Lots of comment updates. Add a NO_HOST_TOOLS=1 config option, and a few "time" calls to stages that didn't have them. Put native-compiler.sh after root-filesystem.sh in build so it's slightly easier to document.
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82 then
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83 time ./host-tools.sh || exit 1
e5f9681a8b3c Lots of comment updates. Add a NO_HOST_TOOLS=1 config option, and a few "time" calls to stages that didn't have them. Put native-compiler.sh after root-filesystem.sh in build so it's slightly easier to document.
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84 fi
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85
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86 # Do we need to build the simple cross compiler?
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87
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88 if not_already simple-cross-compiler
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89 then
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90 # If we need to build cross compiler, assume root filesystem is stale.
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91
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92 rm -rf "$BUILD/simple-root-filesystem-$ARCH.tar.bz2"
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93
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94 time ./simple-cross-compiler.sh "$ARCH" || exit 1
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95 fi
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96
1007
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97 # Optionally, we can build a more capable statically linked compiler via
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98 # canadian cross. (It's more powerful than we need here, but if you're going
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99 # to use the cross compiler in other contexts this is probably what you want.)
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100
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101 if [ ! -z "$CROSS_HOST_ARCH" ] && not_already cross-compiler
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102 then
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103 rm -rf "$BUILD/simple-root-filesystem-$ARCH.tar.bz2"
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104
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105 time ./cross-compiler.sh "$ARCH" || exit 1
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106 fi
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107
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108 # Build the basic root filesystem.
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109
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110 if not_already simple-root-filesystem
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111 then
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112 # If we need to build root filesystem, assume root-filesystem and
2b68517f5b62 Break out simple-root-filesystem.sh and root-filesystem.sh (adding native-compiler.sh output), and use NO_NATIVE_COMPILER to determine which to use. Rename STATIC_CC_HOST to CROSS_HOST_ARCH.
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113 # system-image are stale.
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114
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115 rm -rf "$BUILD/root-filesystem-$ARCH.tar.bz2"
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116 rm -rf "$BUILD/system-image-$ARCH.tar.bz2"
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117
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118 time ./simple-root-filesystem.sh "$ARCH" || exit 1
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119
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120 fi
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121
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122 # Build a native compiler. It's statically linked by default so it can
e5f9681a8b3c Lots of comment updates. Add a NO_HOST_TOOLS=1 config option, and a few "time" calls to stages that didn't have them. Put native-compiler.sh after root-filesystem.sh in build so it's slightly easier to document.
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123 # run on an arbitrary host system.
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124
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125 if not_already native-compiler && [ -z "$NO_NATIVE_COMPILER" ]
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126 then
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127 rm -rf "$BUILD/root-filesystem-$ARCH.tar.bz2"
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128
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129 time ./native-compiler.sh "$ARCH" || exit 1
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130 fi
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131
e5f9681a8b3c Lots of comment updates. Add a NO_HOST_TOOLS=1 config option, and a few "time" calls to stages that didn't have them. Put native-compiler.sh after root-filesystem.sh in build so it's slightly easier to document.
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132 # Install the native compiler into the root filesystem, if necessary.
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133
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134 if not_already root-filesystem && [ -z "$NO_NATIVE_COMPILER" ]
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135 then
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136 rm -rf "$BUILD/system-image-$ARCH.tar.bz2"
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137
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138 time ./root-filesystem.sh "$ARCH" || exit 1
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139 fi
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140
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141 # Package it up into something qemu can boot.
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142
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143 if not_already system-image
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144 then
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145 time ./system-image.sh $1 || exit 1
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146 fi
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147
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148 # Optionally build a system image with a writeable root filesystem.
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149
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150 if [ ! -z "$BUILD_RW_SYSTEM_IMAGE" ] && not_already rw-image
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151 then
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152 # Optimization: don't rebuild kernel if we don't need to.
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153 mkdir -p "$BUILD/rw-system-image-$ARCH" &&
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154 cp "$BUILD/system-image-$ARCH"/zImage-* "$BUILD/rw-system-image-$ARCH"
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155
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156 STAGE_NAME=rw-system-image SYSIMAGE_TYPE=ext2 SYSIMAGE_HDA_MEGS=2048 \
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157 time ./system-image.sh $1 || exit 1
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158 fi